<template>
    <div>
      <!--     面包屑导航-->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

<!--      卡片视图-->
      <el-card>
<!--        添加角色按钮-->
        <el-row>
          <el-col><el-button type="primary">添加角色</el-button></el-col>
        </el-row>

<!--        角色列表区域-->
        <el-table :data="rolelist" border stripe>
<!--          展开列-->
          <el-table-column type="expand">
            <template v-slot="scope">
                <el-row :class="['bdbottom' , i1 === 0 ? 'bdtop' : '' , 'vcenter']" v-for="(item1,i1) in scope.row.children"
                        :key="item1.id">
<!--                  渲染一级权限-->
                  <el-col :span="5 ">
                    <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
<!--                  渲染二级和三级权限-->
                  <el-col :span="19">
<!--                    通过for循环嵌套渲染二级权限-->
                    <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2 , i2) in item1.children" :key="item2.id">
                      <el-col :span="6">
                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                      </el-col>
                      <el-col :span="18">
                        <el-tag type="warning" v-for="(item3,i3) in item2.children"
                         :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                          {{item3.authName}}
                        </el-tag>
                      </el-col>
                    </el-row>
                  </el-col>
                </el-row>
            </template>
          </el-table-column>
<!--          索引列-->
           <el-table-column type="index" label="序号"></el-table-column>
           <el-table-column label="角色名称" prop="roleName"></el-table-column>
           <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
           <el-table-column label="操作" width="300px">
             <template v-slot="scope">
               <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
               <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
               <el-button size="mini" type="warning" icon="el-icon-setting"
                          @click="showSetRightDialog(scope.row)">分配权限</el-button>
             </template>
           </el-table-column>
        </el-table>
      </el-card>

<!--      分配权限对话框-->
      <el-dialog
          title="分配权限"
          v-model="setRightDialogVisible"
          width="50%" @close="setRightDialogClosed">
<!--     树形控件-->
        <el-tree :data="rightslist" :props="treeProps"
                 show-checkbox node-key="id"
                 :default-expand-all="true"
                 :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <template #footer>
    <span class="dialog-footer">
      <el-button @click="setRightDialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>
        </template>
      </el-dialog>

    </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return{
      //所有角色列表
      rolelist: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightslist: [],

      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleId: '',
    }
  },
  created() {
    //获取所有角色列表
     this.getRolesList()
  },

  methods: {
   async getRolesList(){
       const {data: res} = await this.$http.get('roles/')
       if (res.meta.status !== 200) {
         return this.$message.error('获取角色列表失败！')
       }
       this.rolelist = res.data
    },

   async  removeRightById(role,rightId){
     //弹框提示是否删除
     const confirmResult = await this.$confirm('此操作将删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
     if (confirmResult !== 'confirm') {
       return this.$message.info('取消删除权限成功！')
     }
     const {data:res} = await  this.$http.delete
     (`roles/${role.id}/rights/${rightId}`)
     if (res.meta.status !== 200) {
       return this.$message.error('删除权限失败！')
     }
     role.children = res.data
    },

    //展示分配权限的对话框
   async showSetRightDialog(role){
     this.roleId = role.id
     //获取所有权限的数据
     const {data : res} = await this.$http.get('rights/tree')
     if (res.meta.status !== 200){
       return this.$message.error('获取权限数据失败！')
     }
     this.rightslist = res.data
     this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },

    getLeafKeys(node,arr) {
     if (!node.children){
       return arr.push(node.id)
     }
     node.children.forEach(item =>this.getLeafKeys(item , arr))
    },

    setRightDialogClosed() {
     this.defKeys = []
    },

   async allotRights() {
     const keys = [
         ...this.$refs.treeRef.getCheckedKeys(),
         ...this.$refs.treeRef.getHalfCheckedKeys()
     ]
      const idStr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights` , {rids:idStr})
     if (res.meta.status !== 200){
       return  this.$message.error('分配权限失败！')
     }
     this.$message.success('分配权限成功！')
     this.getRolesList()
     this.setRightDialogVisible = false
    },



  }
}
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}

.bdtop{
  border-top: 1px solid #eee;

}

.bdbottom{
  border-bottom: 1px solid #eee;

}

.vcenter {
  display: flex;
  align-items: center;
}

</style>
